Fireproof floor construction.



No. 602,808. Patented Nov. 27, |900. M. .L OMEARA.

FI'REPBOOF FLOR CONSTRUCTHIN.

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SPECIFICATION formingpart of Letters Patent No. 662,808, dated November27, 1900.

Application filed July '7, 1900.

Be it known that I, MICHAEL J. OMEARA, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovement-s in Fireproof Floor Construction, of which the following isa specilication.

My invention relates to that class of fireproof floor construction inwhich hollow lin tels of fire-clay or other suitable material areemployed; and it consists of certain improvements in the lintels usedtherewith whereby I am enabled to strengthen the latter, such improvedform of lintel permitting the use, if desired, of a metallic reinforce.

My invention also includes the reinforcing of the cement or mortar usedas a, filling in and between the lintels and the combination of thisstructure with the improved form of lintel provided with the metallicreinforce.

My invention is fully illustrated in the accompanying drawings, inwhich- Figure l isa sectional view of the improved fireproof iioorconstruction, taken on the line a d, Fig. 2, showing in side elevationand partly in section the improved style of lintel forming a part of myinvention. Fig. 2 is a sectional View, on an enlarged scale, of thelintel forming a part of my invention. Fig. 3 is a sectional View of theimproved reproof door construction, taken on the line b b, Fig. l,showing 'the shape of the lintels and the manner in which the metallicreinforce is introduced both in the lintel and in the cement filling orgrouting.. Fig. I is a plan View of the floor construction before thecement is introduced, showing the manner in which the lintels arearranged. Fig. 5 is a sectional View of a modified form of lintel, andFig. 6 is a perspective view of the end of one of the lintels.

In the lform of tireproof floors to which my invention is applied thelintels serve as a support for the cement only when the latter isdrying. lVhen dry, it becomes self-support ing, and the lintels act asnon-conductors of heat during` iire, thereby preventing thedisintegration of the cement. The ordinary form of lintel used in floorconstruction of this general character has side walls ofthe samethickness as the top arched portion and base portion of the lintels, andI have found that such sehn no. 22,783. dto man.)

with a special View of increasing the strength of the side walls of thesame, thereby overcoming the tendency of the lintel to shear at thenotched ends. I provide for thisincreased strength of the lintel byhaving the side walls hollow, and the point Where they are notched tofit the beams has a bearingsurface nearly three times greater than theusual side walls of lintels of this character. As an additional means ofincreasing the strength of the lintel, a metallic reinforce may bedisposed within the receptacle formed by the hollow portion of the sideWalls.

In the drawings, 1 represents the lintels, having arched tops 2 andhollow side Walls 3, said lintels being also recessed at la, as usual,to fit the danges of the beams. The double side walls provide anadditional bearing-surface at the notched portions la, and the1ongitudinal spaces @I permit the introduction of a metallic reinforce,preferably in the shape of a tie-rod 5. These rods when used may bearranged as shown in Fig. l or disposed in anytsuitable manner, so longas they serve to assist in taking up strains which would other wise fallupon the lintel. The space 4 is preferably iilled with a cement grouting6, and when the reinforcing-rods 5 are used such grouting holds saidrods securely in place.

Instead of solid-wire rods rods made of twisted wire may be employed.

In addition to the rods 5 carried by the lintels I may arrange rods 7 inthecement filling between the lintels. These rods are clearly seen inFig. 2, where they are shown as disposed between the lintels. Ifdesired, more than one rod may be used at this point, and

they may be of truss or inverted-truss form, the object being to stiftenthe floor structure and prevent the breaking of the lintels.

In the form of lintel shown at Figs. 2 and 3 the upper walls areinclined toward the oenter, while the lower portion of said side wall,which is double, is vertical. This arrange- IOO ment is not essential,and in Fig. 5 I have shown a modified form of lintel with straighthollow side walls provided with longitudinal spaces 4.

The improved lintels made in accordance with my invention are preferablygrooved onY the under side, as shown at l0, Fig. 2, for the purpose ofaffording a better holding-surface for the ceiling-plaster ll, and theinner surfaces of the spaces 4 of the hollow side walls are grooved atl0, as seen also in Fig. 2. This feature is not illustrated in Figs. 3and 5, since these views are too small to show the same clearly.

I claim as my inventionl. In a fireproof floor structure, thecombination of the floor-beams, hollow lintels supported by the flangesof said beams, said lintels having arched tops, flat bottom portions andside walls of an inverted-Y shape in crosssection, the double portionsof said walls joining the bottom portion of the lintels, and fillingmaterial disposed between said lintels.

2. In a fireproof floor structure, the combination of the floor-beams,hollow lintels supported by the flanges of said beams, said lintelshaving arched tops, fiat bottom portions and side walls of an inverted-Yshape in crosssection, the double portions of said walls joining thebottom portion of the lintels, filling material disposed between saidlintels, and a metallic reinforce arranged within said filling material.

3. In a fireproof floor structure, the combination of the floor-beams,hollow lintels supported by the flanges of said beams, said lintelshaving arched tops, flat bottom portions and side walls of an inverted-Yshape in crosssection, said side walls being recessed to fit thebeam-flanges at the point where they join the bottom portion of thelintel, said notches being made in the double portion of the wallwhereby an increased bearing-surface for the lintel is provided, andfilling material disposed between said lintels.

4. In a fireproof fioor structure, the combination of the iioor-beams,hollow lintels supported by the flanges of said beams, said lintelshaving arched tops, fiat bottom portions and side walls of an inverted-Yshape in cross-section, said side walls being recessed to fit thebeam-flanges at the point where they join the bottom portion of thelintel, said notches being made in the double portion of the wallwhereby an increased bearing-surface for the lintels is provided,filling material disposed between said lintels, and a metallic reinforcearranged within said filling material.

5. In a fireproof floor structure, the combination of the floor-beams,hollow lintels supported by the flanges of said beams, said lintelshavinghollow walls, metallic reinforcing rods or wires adapted to saidhollow walls, and suitable filling material for holding said rods orwires in place.

6. In a fireproof floor structure, the combination of the floor-beams,hollow lintels supported by the flanges of said beams, said lintelshaving hollow walls, metallic reinforcing rods or wires adapted to saidhollow walls, filling material for holding said rods or wires in place,and filling material disposed b etween said lintels.

7. In a fireproof floor structure of the character described, a lintelhaving hollow side walls, the spaces formed in said walls adapted toreceive metallic reinforces with a grouting to hold such reinforces inplace, the inner walls of said spaces being scored or grooved wherebythe grouting placed therein will be keyed in place, substantially asdescribed.

8. As a new article of manufacture, a hollow lintel for fireproof fioorconstruction having an arched top, a flat bottom portion and side wallsof an inverted-Y shape in crosssection.

9. As a new article of manufacture, a hollow lintel for fireproof floorconstruction having an arched top, a fiat bottom portion and side wallsof an inverted-Y shape in crosssection, said walls being recessed to fitthe beam-flanges.

10. As a new article of manufacture, a hollow lintel for fireproof floorconstruction having hollowside walls for the reception of a metallicreinforce, with provision for retaining said reinforce in place.

11. As a new article of manufacture, a hollowlintel for fireproof lioorconstruction, said lintel having hollow side walls for the reception ofmetallic wires or rods and notched portions at the ends of said lintelsthrough which said rods or wires may'project, with provision forretaining said rods or wires in place.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

MICHAEL J. OMEARA.

Witnesses:

MURRAY C. BOYER, Jos. H. KLEIN.

IOO

